<template> 
<div>
  <div class="search">
      <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
  </div>
  <div class="search-content" ref="search" v-show="keyword">
    <ul>
      <li 
      class="search-item border-bottom" 
      v-for="item of list" 
      :key="item.id"
      @click="handleCityClick(item.name)"
      >{{item.name}}</li>
      <li class="search-item border-bottom" v-show="hasNoData" >no data</li>
    </ul>
  </div>
</div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
  name: "CitySearch",
  props:{
    cities:Object
  },
  data() {
    return{
      keyword:'',
      list:[],
      timer:null
    }
  },
  computed:{
    hasNoData(){
      return !this.list.length
    }
  },
  watch:{
    keyword (){
      if (this.timer){
        clearTimeout(this.timer)
      }
      if(!this.keyword){
        this.list = []
        return
      }
      this.timer = setTimeout(()=>{
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
              result.push(value)
            }
          });
        }
        this.list = result
      },100)
    }
  },
  methods:{
    handleCityClick(city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted (){
    this.scroll = new Bscroll(this.$refs.search)
  }
};
</script>

<style lang="stylus" scoped>
@import '~styles/variables.styl';
.search
    height: 0.72rem
    padding:0 0.1rem
    background:$bgColor
    .search-input
        box-sizing:border-box
        width:100%
        height:.62rem
        padding:0 0.1rem
        line-height:.62rem
        text-align:center
        border-radius:.06rem   
        color:#666 
.search-content
  z-index:1
  overflow: hidden
  position:absolute
  top:1.58rem
  bottom:0
  left:0
  right:0
  background:#eee
  .search-item
    line-height: .62rem
    padding-left: .2rem
    background:#fff
    color:#666
</style>


